The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 05, 2017
Filed:
Dec. 19, 2016
Jvc Kenwood Corporation, Yokohama-shi, Kanagawa, JP;
JVC KENWOOD CORPORATION, Yokohama-Shi, Kanagawa, JP;
Abstract
A projection-type image display device includes a light source, a phosphor, and a filter. The light source emits a first blue illumination light. The phosphor generates a first yellow illumination light of a first wavelength band, which includes a component of a red band and a component of a green band, from a part of the first blue illumination light, and reflects a second blue illumination light and the first yellow illumination light. The filter reflects, to the phosphor side, a third blue illumination light that is a part of the second blue illumination light reflected by the phosphor, and attenuates a component of a second wavelength band of the first yellow illumination light, which is narrower than the first wavelength band. The phosphor also generates a second yellow illumination light from the third blue illumination light reflected by the filter.